Don't write an empty DIAG_USER_MAPPINGS record.
treee74740a9761ed0789993a72fec52941449c8a49c
-rw-r--r-- 4909 CMakeLists.txt
drwxr-xr-x - INPUTS
-rw-r--r-- 2179 INSTALL.txt
-rw-r--r-- 2749 LICENSE.TXT
-rw-r--r-- 2265 Makefile
-rw-r--r-- 96 ModuleInfo.txt
-rw-r--r-- 3276 NOTES.txt
-rw-r--r-- 1260 README.txt
-rw-r--r-- 3307 TODO.txt
drwxr-xr-x - bindings
drwxr-xr-x - clang.xcodeproj
drwxr-xr-x - docs
drwxr-xr-x - examples
drwxr-xr-x - include
drwxr-xr-x - lib
drwxr-xr-x - runtime
drwxr-xr-x - test
drwxr-xr-x - tools
drwxr-xr-x - utils
drwxr-xr-x - www